A communication protocol is a defined set of rules that allows two or more electronic devices to exchange data reliably. Without communication protocols, electronic systems would not be able to coordinate actions, send commands, receive sensor readings, or operate as part of a larger system.In this lesson, we explore three of the most important serial communication protocols used in embedded systems:UART (Universal Asynchronous Receiver/Transmitter)I2C (Inter-Integrated Circuit)SPI (Serial Peripheral Interface)These three protocols form the backbone of most IoT, robotics, and automation projects.
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